2. Overview
● Introduction
● Is all radiation harmful?
● The effects of ionizing radiation on the human
body - 1
● The effects of ionizing radiation on the human
body - 2
● The biological risk of exposure
● Conclusion
3. Introduction
A massive earthquake struck eastern Japan on
March 11.
And gigantic tsunami attack coastal area on
Japan.
These destroyed the Fukushima No.1 power
plant.
And power plant continues to emit radioactive
ingredient.
How would the radioactive ingredient affect our
4. Is all radiation harmful?
The answer is No.
There are two types of radiation:
● non-ionizing
● ionizing
Non-ionizing radiation is safe to human body.
Ionizing radiation is much more dangerous
because it does break chemical bones and thus
does cause cancer.
5. The effects of ionizing radiation on the
human body - 1
That depends on how long you are exposed.
Early symptom
● nausea
● fatigue
After early symptom
● hair loss
● diarrhea
6. The effects of ionizing radiation on the
human body - 2
The next stage
● destruction of the intestinal lining
● worse diarrhea and dehydration
● central nervous system damage
Finally
● loss of consciousness
● death
7. The biological risk of exposure
The biological risk of exposure to radiation is
measured in sieverts.
An exposure of 500,000 microsieverts
● lead to nausea and fatigue within hours
An exposure of 750,000 microsieverts
● hair loss within two or three weeks
An exposure of 1 million microsieverts
● hemorrhage
An exposure of 4 million microsieverts
● death
8. Conclusion
● There are two types of radiation: non-
ionizing and ionizing.
● Produce different symptoms by amount
of radiation.
● It is preferable to avoid to receive
radiation.
